In August 2025, OpenAI released its long-awaited GPT-5 AI model, calling it the “smartest, fastest, and most useful model yet.”
But what really caught the attention of the company’s most diehard fans was the decision to retire all of its previous AI models, news that was met with a massive outcry among ChatGPT users who’d developed a strong attachment to the outgoing GPT-4o.
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